title: catena-Poly[[tri-aqua-copper(II)]-μ-5-carb-oxy-benzene-1,3-di-carboxyl-ato-κ(2) O (1):O (3)].
abstract: In the title complex, [Cu(C9H4O6)(H2O)3] n , the Cu(II) cation exhibits a distorted square-pyramidal coordination geometry involving five O atoms from two monodentate 5-carb-oxy-benzene-1,3-di-carboxyl-ate anions and three water mol-ecules. The 5-carb-oxy-benzene-1,3-di-carboxyl-ate anions bridge Cu(II) cations into zigzag polymeric chains running along the b-axis direction. These chains are further linked by O-H⋯O hydrogen bonds between coordinating water mol-ecules or carboxyl groups and carboxylate groups into a three-dimensional supra-molecular architecture. In the crystal, π-π stacking is observed between parallel benzene rings of adjacent chains, the centroid-centroid distances being 3.584 (3) and 3.684 (3) Å.
authors.affiliation: Air Force Service College, Xuzhou 221000, People's Republic of China.
authors.forename: Yu-Hong
authors.initials: YH
authors.lastname: Ma
authors.forename: Pi-Zhuang
authors.initials: PZ
authors.lastname: Ma
authors.forename: Ting
authors.initials: T
authors.lastname: Yao
authors.forename: Jing-Tuan
authors.initials: JT
authors.lastname: Hao